{"id":207116,"date":"2025-07-08T10:57:30","date_gmt":"2025-07-08T02:57:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207116\/"},"modified":"2025-07-08T10:57:30","modified_gmt":"2025-07-08T02:57:30","slug":"go-%e4%b8%ad%e7%9a%84-mongodb-%e9%a9%b1%e5%8a%a8%e7%a8%8b%e5%ba%8f%e4%b8%8e%e5%85%b6%e4%bb%96%e8%af%ad%e8%a8%80%e5%92%8c%e5%85%b6%e4%bb%96%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e7%9a%84%e6%af%94","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207116\/","title":{"rendered":"Go \u4e2d\u7684 mongodb \u9a71\u52a8\u7a0b\u5e8f\u4e0e\u5176\u4ed6\u8bed\u8a00\u548c\u5176\u4ed6\u6570\u636e\u5e93\u4e2d\u7684\u6bd4\u8f83\u7684\u65f6\u95f4\u7cbe\u5ea6\u95ee\u9898"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>Go \u4e2d\u7684 mongodb \u9a71\u52a8\u7a0b\u5e8f\u4e0e\u5176\u4ed6\u8bed\u8a00\u548c\u5176\u4ed6\u6570\u636e\u5e93\u4e2d\u7684\u6bd4\u8f83\u7684\u65f6\u95f4\u7cbe\u5ea6\u95ee\u9898<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-20 09:15:34<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u5c0f\u4f19\u4f34\u4eec\u6709\u6ca1\u6709\u89c9\u5f97\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u5f88\u6709\u610f\u601d\uff1f\u6709\u610f\u601d\u5c31\u5bf9\u4e86\uff01\u4eca\u5929\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aGo \u4e2d\u7684 mongodb \u9a71\u52a8\u7a0b\u5e8f\u4e0e\u5176\u4ed6\u8bed\u8a00\u548c\u5176\u4ed6\u6570\u636e\u5e93\u4e2d\u7684\u6bd4\u8f83\u7684\u65f6\u95f4\u7cbe\u5ea6\u95ee\u9898\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u82e5\u662f\u5728\u5b66\u4e60\u4e2d\u5bf9\u5176\u4e2d\u90e8\u5206\u77e5\u8bc6\u70b9\u6709\u7591\u95ee\uff0c\u6216\u8bb8\u770b\u4e86\u672c\u6587\u5c31\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u6b63\u5728\u5b66\u4e60 go \u548c mongodb\uff0c\u76ee\u524d\u4f7f\u7528 alpha \u5b98\u65b9 mongodb \u9a71\u52a8\u7a0b\u5e8f\u3002\u867d\u7136\u5b83\u8fd8\u5904\u4e8e alpha \u9636\u6bb5\uff0c\u4f46\u6211\u8ba4\u4e3a\u5b83\u5bf9\u4e8e\u57fa\u672c\u7528\u9014\u6765\u8bf4\u5df2\u7ecf\u76f8\u5f53\u5b9e\u7528\u4e86\u3002 \u4f46\u6211\u5728\u8fd9\u4e2a\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u4e2d\u9047\u5230\u4e86\u4e00\u4e2a\u5173\u4e8e\u65f6\u95f4\u8f6c\u6362\u7684\u6709\u8da3\u95ee\u9898\u3002<\/p>\n<p>\u57fa\u672c\u4e0a\uff0c\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7c7b\u578b\u7684\u7ed3\u6784\u5bf9\u8c61\uff0c\u5e76\u5c06\u5176\u5c01\u9001\u5230 bson \u6587\u6863\uff0c\u7136\u540e\u5c06 bson \u6587\u6863\u8f6c\u6362\u56de\u7ed3\u6784\u5bf9\u8c61\u3002<\/p>\n<pre>\/\/check github.com\/mongodb\/mongo-go-driver\/blob\/master\/bson\/marshal_test.go\nfunc testuserstructtobsonandbackwards(t *testing.t) {\nu := user{\n    username:          \"test_bson_username\",\n    password:          \"1234\",\n    useraccessibility: \"normal\",\n    registerationtime: time.now(), \/\/.format(time.rfc3339), adding format result a string\n}\n\n\/\/struct to bson\nbsonbytearray, err := bson.marshal(u)\nif err != nil {\n    t.error(err)\n}\n\/\/.unmarshaldocument is the same as readdocument\nbdoc, err := bson.unmarshaldocument(bsonbytearray)\nif err != nil {\n    t.error(err)\n}\nunamefrombson, err := bdoc.lookuperr(\"username\")\n\/\/so here the binding is working for bson object too, the bind field named username ratherthan username\nif err != nil {\n    t.error(err)\n}\nif unamefrombson.stringvalue() != \"test_bson_username\" {\n    t.error(\"bson from user struct error\")\n}\n\n\/\/bson doc to user struct\nbsonbytearrayfromdoc, err := bdoc.marshalbson()\nif err != nil {\n    t.error(err)\n}\n\nvar newu user\nerr = bson.unmarshal(bsonbytearrayfromdoc, &amp;newu)\nif err != nil {\n    t.error(err)\n}\n\nif newu.username != u.username {\n    t.error(\"bson doc to user struct error\")\n}\n\n\/\/here we have an issue about time format.\nif newu != u {\n    log.println(newu)\n    log.println(u)\n    t.error(\"bson doc to user struct time error\")\n}\n}<\/pre>\n<p>\u4f46\u662f\uff0c\u7531\u4e8e\u6211\u7684\u7ed3\u6784\u5bf9\u8c61\u6709\u4e00\u4e2a\u65f6\u95f4\u5b57\u6bb5\uff0c\u56e0\u6b64\u7ed3\u679c\u7ed3\u6784\u5bf9\u8c61\u5305\u542b\u7684\u65f6\u95f4\u503c\u4e0d\u5982\u539f\u59cb\u503c\u51c6\u786e\u3002\u90a3\u4e48\u6bd4\u8f83\u5931\u8d25\u3002 <\/p>\n<pre>=== RUN   TestUserStructToBsonAndBackwards\n{test_bson_username 1234     0001-01-01 00:00:00 +0000 UTC   2018-08-28 23:56:50.006 +0800 CST 0001-01-01 00:00:00 +0000 UTC normal }\n{test_bson_username 1234     0001-01-01 00:00:00 +0000 UTC   2018-08-28 23:56:50.006395949 +0800 CST m=+0.111119920 0001-01-01 00:00:00 +0000 UTC normal }\n--- FAIL: TestUserStructToBsonAndBackwards (0.00s)\n    model.user_test.go:67: bson Doc to user struct time Error<\/pre>\n<p>\u6240\u4ee5\u6211\u60f3\u95ee\u5f88\u591a\u95ee\u9898\u3002 <\/p>\n<ol>\n<li>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5982\u4f55\u6b63\u786e\u6bd4\u8f83\u65f6\u95f4\uff1f<\/p>\n<\/li>\n<li>\n<p>\u5728\u6570\u636e\u5e93\u4e2d\u5b58\u50a8\u65f6\u95f4\u4ee5\u907f\u514d\u6b64\u7c7b\u7cbe\u5ea6\u95ee\u9898\u7684\u6700\u4f73\u65b9\u6cd5\u662f\u4ec0\u4e48\uff1f\u6211\u8ba4\u4e3a\u6570\u636e\u5e93\u4e2d\u7684\u65f6\u95f4\u4e0d\u5e94\u8be5\u662f\u5b57\u7b26\u4e32\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fd9\u662f\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u9519\u8bef\u5417\uff1f<\/p>\n<\/li>\n<\/ol>\n<p> <\/p>\n<h2>\u89e3\u51b3\u65b9\u6848<\/h2>\n<p> <\/p>\n<p>bson \u4e2d\u7684\u65f6\u95f4\u8868\u793a\u4e3a\u81ea unix \u7eaa\u5143 () \u4ee5\u6765\u7684 utc \u6beb\u79d2\u3002 go \u4e2d\u7684\u65f6\u95f4\u503c\u5177\u6709\u7eb3\u79d2\u7cbe\u5ea6\u3002<\/p>\n<p>\u5bf9\u4e8e\u5f80\u8fd4\u65f6\u95f4\u3002\u901a\u8fc7 bson \u7f16\u7ec4\u7684\u65f6\u95f4\u503c\uff0c\u4f7f\u7528\u81ea unix \u7eaa\u5143\u4ee5\u6765\u622a\u65ad\u4e3a\u6beb\u79d2\u7684\u65f6\u95f4\uff1a<\/p>\n<pre>func truncate(t time.time) time.time {\n    return time.unix(0, t.unixnano()\/1e6*1e6)\n}\n\n...\n\nu := user{\n    username:          \"test_bson_username\",\n    password:          \"1234\",\n    useraccessibility: \"normal\",\n    registerationtime: truncate(time.now()), \n}<\/pre>\n<p>\u60a8\u8fd8\u53ef\u4ee5\u4f7f\u7528\u65b9\u6cd5\uff1a<\/p>\n<pre>u := user{\n    username:          \"test_bson_username\",\n    password:          \"1234\",\n    useraccessibility: \"normal\",\n    registerationtime:  time.now().truncate(time.millisecond),\n}<\/pre>\n<p>\u6b64\u65b9\u6cd5\u4f9d\u8d56\u4e8e unix \u7eaa\u5143\u548c go \u96f6\u65f6\u95f4\u76f8\u5dee\u6574\u6570\u6beb\u79d2\u8fd9\u4e00\u4e8b\u5b9e\u3002<\/p>\n<p>\u60a8\u5df2\u6b63\u786e\u8bc6\u522b\u51fa\u95ee\u9898\u662f<em>\u7cbe\u5ea6<\/em>\u4e4b\u4e00.<\/p>\n<p>\u201c\u4e00\u4e2a 64 \u4f4d\u6574\u6570\uff0c\u8868\u793a<strong>\u6beb\u79d2<\/strong>\u6570&#8230;\u201d\u3002<\/p>\n<p>\u201c\u8868\u793a<strong>\u7eb3\u79d2<\/strong>\u7cbe\u5ea6\u7684\u77ac\u95f4\u201d\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5982\u679c\u5c06\u8fd9\u4e9b\u5404\u81ea\u7684\u503c\u4f5c\u4e3a golang \u7c7b\u578b\u8fdb\u884c\u6bd4\u8f83\uff0c\u53ea\u6709\u5f53 golang \u65f6\u95f4\u5177\u6709\u6beb\u79d2\u5206\u8fa8\u7387\uff08\u4f8b\u5982\uff0c\u5fae\u79d2\u548c\u7eb3\u79d2\u4f4d\u7f6e\u4e3a\u96f6\uff09\u65f6\uff0c\u60a8\u624d\u4f1a\u83b7\u5f97\u7b49\u6548\u503c\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>gotime := time.Now() \/\/ Nanosecond precision\njstime := gotime.Truncate(time.Millisecond) \/\/ Milliseconds\ngotime == jstime \/\/ =&gt; likely false (different precision)\n\nisoMillis := \"2006-01-02T15:04:05.000-0700Z\"\ngomillis := gotime.Format(isoMillis)\njsmillis := jstime.Format(isoMillis)\ngomillis == jsmillis \/\/ =&gt; true (same precision)<\/pre>\n<p>\u4eca\u5929\u5173\u4e8e\u300aGo \u4e2d\u7684 mongodb \u9a71\u52a8\u7a0b\u5e8f\u4e0e\u5176\u4ed6\u8bed\u8a00\u548c\u5176\u4ed6\u6570\u636e\u5e93\u4e2d\u7684\u6bd4\u8f83\u7684\u65f6\u95f4\u7cbe\u5ea6\u95ee\u9898\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207116","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207116","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207116"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207116\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}